CFR 146E - Respiratory Protection Assigned Protection Factors

On August 24, 2006, federal OSHA issued this final rule to revise its existing respiratory protection standard (29 CFR 1910.134) to add definitions and requirements for Assigned Protection Factors (APFs) and Maximum Use Concentrations (Federal Register). The revisions also supersede the respirator selection provisions of existing substance specific standards in 29 CFR 1910, 1915.154 (Refers back to 1910.134 as being identical) , and 1926.103 (Refers back to 1910.134 as being identical) with these new APFs (except for the 1,3-Butadiene standard). The N.C. Commissioner of Labor adopted the revised federal standards verbatim with an effective date of November 22, 2006.

Also reference CFR 146F -Respiratory Protection Standard: Additional Ambient Aerosol CNC QNFT Protocols, Field Operations Manual Chapter 15: Industrial Hygiene Compliance, CPL 02-00-158, Inspection Procedures for the Respiratory Protection Standard, 29 CFR 1910.134, OPN 127 - Respirator Use Policy under the Cotton Dust Standard,  SN 55 - Facial Hair and Respirator Use,  SN 63 Requirements for Workers Who Are Actively Conducting Operations in IDLH Atmospheres, SN 68 - Use of Non-NIOSH Approved Respirators for Voluntary Use and OSHA Technical Manual (TED 01-00-015). Additional information and resources can be found on the safety and health topic page for Respiratory Protection.